parent
bcfd2c44ab
commit
a057bbd26a
@ -0,0 +1,55 @@ |
||||
# Muscles Part 2 |
||||
|
||||
## muscle tension |
||||
|
||||
* isotonic, movement |
||||
* concentric - shorten |
||||
* eccentric - lengthen |
||||
* isometric, no movement |
||||
|
||||
always needs nervous system input |
||||
|
||||
difference between stability and movement basically |
||||
|
||||
## Motor units and recruitment |
||||
|
||||
neurons that go to specific fibers |
||||
|
||||
motor unit - plus muscle fibers that it communicate with. allows for changing value of force used. |
||||
|
||||
activate muscles in rotation - so we avoid over stressing |
||||
|
||||
dont use till it is no longer working. just rotate so that the transitions are less jaring |
||||
|
||||
## Muscles rarely completly relax |
||||
muscle tone when not flexing is because of higher muscle density |
||||
|
||||
hypertonia - too few recruited muscles (unable to move) |
||||
|
||||
hypertonia - too muchj muscle stress (unable to relax) |
||||
|
||||
|
||||
## Skeletal Muscle Movement |
||||
* form dictates function |
||||
* muscles are attached to bones to allow for movement |
||||
* muscle origin - anchor point (bicept on the humerous /scapulus) |
||||
* muscle insertion - (bicept to radius) |
||||
|
||||
|
||||
you will have a chart of origin, insertion, action |
||||
|
||||
elbow hinge joint |
||||
muscles are with joints |
||||
|
||||
## Muscles (almost) never work alone |
||||
* aiding, opposite work together |
||||
|
||||
prime mover/ agonist -> main muscle moving things |
||||
|
||||
synergist -> assits movement |
||||
|
||||
antagonist -> opposite movement of agonist |
||||
* maintains body position |
||||
* needed for rapid movement |
||||
|
||||
|
Loading…
Reference in new issue